Multi-room Audio with Amazon Echo Dot using TVs, PCs, CD Players & Bluetooth Speaker

Hi, this video shows you how to inexpensively stream your music from your Amazon Echo Dot to all the rooms in your house using existing equipment like TVs, CD players and computers. Unfortunately if you buy multiple Echo Dots you cannot stream music on them all at the same time, they will only stream on one unit at a time (this may change in the future). The video also shows you how to use a Bluetooth Speaker with the Amazon Echo Dot.
The objective was to use what I already had in the house to save money. If money isn't an issue then you can get much better setups using for example a Sonos system but the idea was to do this as cheap as possible.
The audio signals are travelling down network wiring such as cat5e and cat6 cables but you can also make them travel down numerous 3.5mm audio cables which you can buy very cheaply with long lengths and they are very thin so easier to hide and install than network cables but network cables provide more flexibility as they can be used for other projects like HDMI over cat5e etc.
My setup could have been more straight forward but I wanted to include the PC and the DATA/VOICE economisers to give more ideas and variety of how you can set things up in your own property.
Many thanks Vince